Use of plasticisers for thermo-plasticizing starch
US5773495A · kind A · utility
28Cited by
18References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1997 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Jan 3, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L3/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to the use of biodegradable graft copolymers producible in the presence of empirically determined quantities of water from polyvinyl alcohols with a degree of saponification of 88 to 99.5 mol. % by an acid catalysed acetalisation and/or transacetylisation reaction with carbohydrates containing carbonyl groups or presumptive carbonyl groups, in which the degree of acetqalisation, expressed in carbonyl equivalents per 100 vinyl alcohol equivalents, is between 0.2 and 20, and preferably between 1 and 10, as a plasticiser for the thermoplaticisation of starch and/or starch mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.